In Mexico only 850 Pesos per day is deductible for Car rental. I'm curious how other companies post this deductible portion to their ledger since there's only a single line in the SAE. Do you have a custom field on your expense entry for # of rental days? Does your bridge program split into deductible and non-deductible ledger postings by taking the amount/# of rental days? Do you handle in another way?
